In 2002, he published The Emerging Democratic Majority (co-written with political scientist Ruy Teixeira), a book arguing that Democrats would retake control of American politics, thanks in part to growing support from minorities and well-educated professionals. Its title was a deliberate echo of Kevin Phillips' 1969 classic, The Emerging Republican Majority. The book was named one of the year's best by The Economist.

In 2014 he authored the book Genesis: Truman, American Jews, and the Origins of the Arab/Israeli Conflict in which he discussed the connection between the Israel lobby in the United States and the origin of the modern state of Israel.